I’ve experienced this as well. I think that sound is road surface induced.
In my opinion the Stinger is very vocal in transmitting road surface via sound and vibration.
On seemingly smooth roads that other cars glide down relatively vibration free, the Stinger transmits road grain and texture info right up through the Steering and Seats. If you listen closely there are all sorts of sounds accompanying this. The alert ear will notice this as a very low rumble, or repetitive thumping.
I think this is a side effect of the Stingers shock and bushing calibration. It simply lets a bit of low frequency chatter, rumble, and vibration in. The Stinger taught me that a lot of roads that I previously considered smooth, weren’t really all that smooth at all. My previous vehicles just did a better job of filtering out that road texture.
I think the Stinger shocks are calibrated to have a very firm initial reaction to small inputs (perhaps too firm). Then that is immediately followed by a soft control of actual bumps. I can’t help but thinking a good bit of Stinger noise complaints come from this tuning.
All of that being said, I think that is just how it is, as the Stinger rides brilliantly on a truly smooth surface.
It rides fairly decent on a bad surface too, but with perhaps too much noise.
But it suffers on average to marginal surfaces that look smooth to the eye.
I drove a couple Stingers before I bought mine. All of them had the same familiar sound and feel as the tires rolled over the pavement. I’m interested to see if the G70 calibration feels or sounds any different.
